JOLLY- Professional phone case factory since 2010 

how phone cases are made

by:Jolly     2023-05-10


Phones are essential devices that we carry around with us every day, which is why it's important to protect them. Phone cases are the perfect solution to safeguard your device from scratches, drops, and other hazards. But have you ever wondered how phone cases are made? In this article, we'll explore the process of creating phone cases and the materials used.

What are Phone Cases made of?

Phone cases can be made from various materials, including silicone, thermoplastic polyurethane (TPU), polycarbonate (PC), leather, and metal. Each material has its unique characteristics and advantages.

Silicone: Silicone is a soft and flexible material that provides excellent shock absorption. It is easy to grip and provides a non-slip surface to hold your phone.

TPU: TPU is a hybrid material that combines the properties of silicone and plastic. It provides good protection against drops, scratches, and impacts.

Polycarbonate: Polycarbonate is a durable and sturdy material that can withstand high impacts. It is commonly used in rugged phone cases.

Leather: Leather cases are stylish and provide a high-end look to your phone. They are usually handcrafted and can last for a long time.

Metal: Metal cases are tough and add a layer of protection to your phone. They come in various designs and provide a premium feel.

Designing the

Before the manufacturing process begins, the design team creates a 3D model of the phone case using computer-aided design (CAD) software. The model is then sent to the manufacturer, who creates a prototype using a 3D printer. The prototype is then tested for fit, durability, and grip. Once the design is approved, the manufacturing process can start.

The Manufacturing Process

The manufacturing process for phone cases depends on the material used. In this section, we'll take a look at the manufacturing process for silicone, TPU, and polycarbonate phone cases.

Manufacturing Silicone Phone Cases

Step 1: Mixing the Silicone

The first step in creating silicone phone cases is mixing the silicone material with a catalyst. The ratio of the silicone to the catalyst varies depending on the desired hardness of the case.

Step 2: Mold Making

Once the silicone is mixed, it is poured into a mold. The mold is usually made from aluminum or steel and is designed to the exact specifications of the phone case.

Step 3: Curing

The silicone is then placed in an oven to cure for a specific amount of time. The heat and pressure cause the silicone to harden into the shape of the mold.

Step 4: Trimming

After the silicone has cured, the excess material is trimmed away, and any logos or designs are added using screen printing.

Manufacturing TPU Phone Cases

Step 1: TPU Extrusion

The TPU material is placed into an extrusion machine, where it is heated and melted. The heated material is then forced through a die, which gives it the desired shape and size.

Step 2: Cutting

Once the TPU has been extruded, it is cut to the required length using a cutting machine.

Step 3: Printing and Finishing

Any logos or designs are then added to the TPU using screen printing or other methods. The finished phone cases are then inspected for quality and packaged for shipping.

Manufacturing Polycarbonate Phone Cases

Step 1: Injection Molding

Polycarbonate phone cases are made using injection molding. The polycarbonate pellets are melted and injected into a mold under high pressure. The mold is then cooled, causing the polycarbonate to harden into the desired shape.

Step 2: Trimming and Coating

Any excess material is then trimmed away, and the case may receive a coating for added protection or design elements.


Phone cases are essential accessories that keep our phones safe and secure. They come in various materials, designs, and styles. The manufacturing process for phone cases involves different methods, depending on the material used. By understanding the process of creating phone cases, we can appreciate the craftsmanship and care that goes into making them.

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